I2CCC26XX.h

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/*
 * Copyright (c) 2015, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef ti_drivers_i2c_I2CCC26XX__include
#define ti_drivers_i2c_I2CCC26XX__include

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stdbool.h>
#include <ti/drivers/I2C.h>
#include <ti/drivers/pin/PINCC26XX.h>
#include <ti/sysbios/family/arm/cc26xx/Power.h>

#define ti_sysbios_family_arm_m3_Hwi__nolocalnames
#include <ti/sysbios/family/arm/m3/Hwi.h>
#include <ti/sysbios/knl/Semaphore.h>

typedef unsigned long   I2CBaseAddrType;
typedef unsigned long   I2CDataType;

extern const I2C_FxnTable I2CCC26XX_fxnTable;

typedef struct I2CCC26XX_I2CPinCfg {
    uint8_t pinSDA;
    uint8_t pinSCL;
} I2CCC26XX_I2CPinCfg;

typedef enum I2CCC26XX_Mode {
    I2CCC26XX_IDLE_MODE = 0,  /* I2C is not performing a transaction */
    I2CCC26XX_WRITE_MODE,     /* I2C is currently performing write operations */
    I2CCC26XX_READ_MODE,      /* I2C is currently performing read operations */
    I2CCC26XX_ERROR = 0xFF    /* I2C error has occurred, exit gracefully */
} I2CCC26XX_Mode;

typedef struct I2CCC26XX_HWAttrs {
    I2CBaseAddrType     baseAddr;
    unsigned long       powerMngrId;
    int                 intNum;
    uint8_t             intPriority;
    uint8_t             sdaPin;
    uint8_t             sclPin;
} I2CCC26XX_HWAttrs;

typedef struct I2CCC26XX_Object {
    /* I2C control variables */
    I2C_TransferMode    transferMode;        
    I2C_CallbackFxn     transferCallbackFxn; 
    volatile I2CCC26XX_Mode mode;            
    uint32_t            bitRate;             
    /* I2C SYS/BIOS objects */
    ti_sysbios_family_arm_m3_Hwi_Struct hwi;
    Semaphore_Struct    mutex;              
    Semaphore_Struct    transferComplete;   
    /* PIN driver state object and handle */
    PIN_State              pinState;
    PIN_Handle             hPin;

    /* I2C current transaction */
    I2C_Transaction     *currentTransaction; 
    uint8_t             *writeBufIdx;        
    unsigned int        writeCountIdx;       
    uint8_t             *readBufIdx;         
    unsigned int        readCountIdx;        
    /* I2C transaction pointers for I2C_MODE_CALLBACK */
    I2C_Transaction     *headPtr;            
    I2C_Transaction     *tailPtr;            
    /* I2C power notification */
    void                *i2cPostFxn;        
    Power_NotifyObj     i2cPostObj;         
    bool                isOpen;             
} I2CCC26XX_Object;

/* Do not interfere with the app if they include the family Hwi module */
#undef ti_sysbios_family_arm_m3_Hwi__nolocalnames

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_i2c_I2CCC26XX__include */